The Qianjiangping landslide was caused by a combination of the Three Gorges reservoir impoundment and heavy rainfall. A study analyzed how these factors affected the landslide, focusing on specific parameters like material weight and water levels. The research found that the lower section's shear strength was crucial in triggering the landslide, with the reservoir impoundment playing a bigger role than rainfall. The cohesion of the lower section had the most impact on the landslide's stability, while groundwater levels had less influence. Overall, the reservoir impoundment contributed significantly to the landslide, with rainfall potentially acting as a trigger.